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lazy-z utils

lazy-z is a light-weight NodeJS library for assorted shortcuts and utilities

Table of Contents

  1. Installation
  2. Revision Constructor
  3. Shortcut Methods
  4. Value Test Methods
  5. String Methods
  6. Number Methods
  7. Object Methods
  8. Encoding Methods
  9. CLI Utility Methods
  10. Array Methods
  11. lazyZstate
  12. axios mocks
  13. Networking Utilities
  1. Contributing
  2. Code Test Coverage

Installation

npm i lazy-z

Revision Constructor

The revision constructor allows for users to update complex JSON objects in place with easy to read chaining syntax.

let testData = {
  data : [
    {
      name: "test"
      value: false
    }
  ]
}

new revision(testData).child("data", "test").update({value: true});

// updates testData to
{
  data : [
    {
      name: "test"
      value: true
    }
  ]
}

Revision Methods

revision.child

Get data from an object. If getting data from an array of objects, users can specify a search value and index. The default index is name.

const { revision } = require("lazy-z");

let testData = {
  sons: [
    {
      name: "myson",
      value: "yes",
    },
    {
      name: "myotherson",
      value: "also yes",
    },
  ],
};

let obj = new revision(testData).child("sons", "myson").data;
// gets the value
{
  name: "myson",
  value: "yes",
}

let obj = new revision(testData).child("sons", "also yes", "value").data;
// gets the value
{
  name: "myotherson",
  value: "also yes"
}

let obj = new revision(testData).child("sons", "also yes", "value").child("name").data;
// gets the value
"myotherson"

revision.deleteArrChild

Delete an object from an array of objects using a value, and optionally an index (defaults to name).

const { revision } = require("lazy-z");
let testData = {
  enemies: [
    {
      name: "myson",
      value: "yes",
    },
    {
      name: "myotherson",
      value: "also yes",
    },
  ],
};

new revision(testData)
  .child("enemies")
  .deleteArrChild("myson")
  .deleteArrChild("also yes", "value");

// deletes entries from array `enemies` testData value is now
{
  enemies: [];
}

revision.duplicateIndexCheck

check an array of objects has a duplicate field value.

const { revision } = require("lazy-z");

let testData = {
  friends: [
    {
      name: "gary",
      test: "test",
    },
  ],
};

// throws an error, an object with name gary already exists in `friends` array
new revision(testData).duplicateIndexCheck("friends", { name: "gary" });

// throws an error, an object with the test value `"test"`  already exists in `friends` array
new revision(testData).duplicateIndexCheck(
  "friends",
  {
    name: "todd",
    test: "test",
  },
  {
    oldValue: "frog",
    index: "test",
  }
);

// does not throw
new revision(testData).duplicateIndexCheck("friends", { name: "kyle" });

revision.push

Push a value to a nested child array. Users specify a template and parameters for an object, or only parameters.

No Template

const { revision } = require("lazy-z");

let testData = {
  sons: [
    {
      name: "myson",
      value: "yes",
    },
    {
      name: "myotherson",
      value: "also yes",
    },
  ],
};

// adds the object to the sons array
new revision(testData).child("sons").push({
  name: "todd",
});

With Template

const { revision } = require("lazy-z");

let testData = {
  sons: [
    {
      name: "myson",
      value: "yes",
    },
    {
      name: "myotherson",
      value: "also yes",
    },
  ],
};
let template = { _no_default: ["foo", "name", "value"], _defaults: { bar: true } };

new revision(testData).child("sons").push(template, {
  name: "todd",
});

// adds the object to the sons array
{
  name: "todd",
  foo: null,
  value: null,
  bar: true
}

revision.set

Set the value of an object key. Users specify a template and parameters for an object, or only parameters.

const { revision } = require("lazy-z");

let testData = {
  sons: [
    {
      name: "myson",
      value: "yes",
    },
    {
      name: "myotherson",
      value: "also yes",
    },
  ],
};
const template = { _no_default: ["foo", "bar", "name", "value"] };
new revision(testData).set("todds_place", template, {
  name: "todd",
});

// sets test_data.todds_place to value
{
  foo: null,
  bar: null,
  name: "todd",
  value: null
}

revision.setDoneCallback

Set a callback function for the revision constructor. Trigger the function by calling .done() when terminating the chain.

const { revision } = require("lazy-z");

let testData = {
  sons: [
    {
      name: "myson",
      value: "yes",
    },
    {
      name: "myotherson",
      value: "also yes",
    },
  ],
};
const template = { _no_default: ["foo", "bar", "name", "value"] };
new revision(testData)
    .setDoneCallback(data => { console.log(data) })
    .set("todds_place", template, {
      name: "todd",
    })
    .done();

// logs when done:
{
  sons: [
    {
      name: "myson",
      value: "yes",
    },
    {
      name: "myotherson",
      value: "also yes",
    },
  ],
  todds_place: {
    foo: null,
    bar: null,
    name: "todd",
    value: null
  }
}

revision.then

Perform arbitrary code in the chain using the current data without exiting.

const { revision } = require("lazy-z");

let testData;
new revision({ hi: "mom" }).then((data) => {
  testValue = data;
});

// sets testValue to
{
  hi: "mom";
}

revision.update

Update an object from a complex object in place.

const { revision } = require("lazy-z");

let testData = {
  sons: [
    {
      name: "myson",
      value: "yes",
    },
    {
      name: "myotherson",
      value: "also yes",
    },
  ],
};

new revision(testData)
  .child("sons", "myotherson")
  .update({ value: "awww yeah" });

// sets the value of testData.sons[1] in place to
{
  name: "myotherson",
  value: "awww yeah",
}

revision.updateChild

Update a child array without changing the data in the revision store chain.

const { revision } = require("lazy-z");

let testData = {
  friends: [{ name: "bear", test: "value" }],
};

let updateData = new revision(testData).updateChild("friends", "bear", {
  test: "thumbsup",
}).data;

// value for testData and update data
{
  friends: [{ name: "bear", test: "thumbsup" }],
}

revision.updateEachChild

Update each child of an array with a callback function.

const { revision } = require("lazy-z");

let testData = {
  friends: [
    {
      name: "kyle",
      high_score: 12,
    },
    {
      name: "kevin",
      high_score: 100,
    },
  ],
};

// change each value for high_score to 0 in place
new revision(testData).updateEachChild("friends", (friend) => {
  friend.high_score = 0;
});

revision.updateEachNestedChild

Update each nested child within any depth of arrays.

const { revision } = require("lazy-z");
let testData = {
  a: [
    {
      b: [
        {
          c: [{ test: "true" }],
        },
      ],
    },
    {
      b: [
        {
          c: [{ test: "true" }],
        },
        {
          c: [{ test: "true" }],
        },
      ],
    },
  ],
};

new revision(testData).updateEachNestedChild(["a", "b", "c"], (entry) => {
  entry.test = false;
});

// updates test data value to
{
  a: [
    {
      b: [
        {
          c: [{ test: false }],
        },
      ],
    },
    {
      b: [
        {
          c: [{ test: false }],
        },
        {
          c: [{ test: false }],
        },
      ],
    },
  ];
}

Shorcut Methods

azObjectSort

Callback function for the sort command to order arrays from a to z

const { azsort } = require("lazy-z");

[{ id: 5 }, { id: 10 }, { id: 1 }].sort((a, b) => {
  return shortcuts.azsort(a, b, "id");
})
// returns
[
  { id: 1 },
  { id: 5 },
  { id: 10 }
]

azsort

Callback function for the sort command to order strings from a to z

const { azsort } = require("lazy-z");

["frog", "egg", "todd", "help"].sort(azsort);
// returns
["egg", "frog", "help", "todd"];

buildNumberDropdownList

Creates a list of numbers as a string

const { buildNumberDropdownList } = require("lazy-z");

buildNumberDropdownList(5)

// returns
["0", "1", "2", "3", "4"];

contains

Shortcut to check if string or array contains a value

const { contains } = require("lazy-z");

contains("egg nog", "egg");

// returns
true;

contains(["egg", "nog"], "egg");
// returns
true;

containsKeys

Check to see if an object contains a key

const { containsKeys } = require("lazy-z");

containsKeys({ one: 1, two: 2 }, "one");
// returns
true;

deepEqual

Check to see if two values have all fields equal.

const { deepEqual } = require("lazy-z");

deepEqual({ foo: "bar" }, { foo: "baz" }); // returns false
deepEqual({ foo: "bar" }, { foo: "bar" }); // returns true

distinct

Returns all distinct entries in an array

const { disctinct } = require("lazy-z");

distinct(["c", "a", "b", "b", "a", "g", "e"])[
  // returns
  ("c", "a", "b", "g", "e")
];

eachKey

Shortcut for Object.keys(object).forEach(i => {})

const { eachKey } = require("lazy-z");

eachKey({ one: 1, two: 2 }, (key, index) => {
  console.log(key + " " + index);
});

eachZone

Shortcut for ["zone-1", "zone-2", "zone-3"].forEach(...)

const { eachZone } = require("lazy-z")

eachZone(3, zone => {
  console.log(zone);
})

isArray

Test if a value is an Array

const { isArray } = require("lazy-z");

isArray([]); // returns true
isArray("item"); // returns false

isArrayOfObjects

Test if a value is an Array of Objects

const { isArrayOfObjects } = require("lazy-z");

isArrayOfObjects([{ hi: "mom"}]); // returns true
isArrayOfObjects("item"); // returns false

isBoolean

Test if a value is boolean

const { isBoolean } = require("lazy-z");

isBoolean(true); // returns true
isBoolean(["item"]); // returns false

isEmpty

Test if an array has no entries

const { isEmpty } = require("lazy-z");

let emptyArray = [];

isEmpty(emptyArray); // returns true
isEmpty(["item"]); // returns false

isFunction

Returns true if a value is a function

const { isFunction } = require("lazy-z");

isFunction("string"); // returns false
isFunction(isFunction); // returns true

isIpv4CidrOrAddress

Test if a value is a valid IPV4 CIDR block or address.

const { isIpv4CidrOrAddress } = require("lazy-z");

isIpv4CidrOrAddress("8.8.8.8"); // returns true
isIpv4CidrOrAddress("8.8.8.8/8"); // returns true
isIpv4CidrOrAddress("item"); // returns false

isNullOrEmptyString

Test if a value is null or an empty string

const { isNullOrEmptyString } = require("lazy-z");

isNullOrEmptyString(null); // returns true
isNullOrEmptyString(""); // returns true
isNullOrEmptyString("item"); // returns false

isString

Test if a value is a string

const { isString } = require("lazy-z");

isString("string"); // returns true
isString(["item"]); // returns false

isWholeNumber

Shortcut for <number> % 1 === 0;

const { isWholeNumber } = require("lazy-z");

isWholeNumber(1000); // returns true
isWholeNumber(1.234); // returns false

areNotWholeNumbers

Returns true if any number passed as an argument is not a whole number:

const { areNotWholeNumbers } = require("lazy-z");

areNotWholeNumbers(1000, 0, 3.2, 1); // returns true
areNotWholeNumbers(1, 2, 3, 4, 5); // returns false

keys

Get the keys of an object

const { keys } = require("lazy-z");
keys({ one: 1, two: 2 })[
  // returns
  ("one", "two")
];

keyValueType

Get the type of an object property by key name

const { keyValueType } = require("lazy-z");

keyValueType({ one: 1 }, "one");
// returns
("number");

numberToZoneList

Get a list of zones from a number to string

const { numberToZoneList } = require("lazy-z");

numberToZoneList(3);
// returns
["zone-1", "zone-2", "zone-3"]

objectAtFirstKey

Shortcut to get the nested object from the first key of the parent

const { objectAtFirstKey } = require("lazy-z");

let obj = {
  sub_obj: {
    one: "one",
  },
};

objectAtFirstKey(obj);
// returns
{
  one: "one";
}

prettyJSON

Shortcut for JSON.stringify(obj, null, 2)

const { prettyJSON } = require("lazy-z");

prettyJSON({ one: 1, two: 2 });

// returns string
`{
    "one" : 1,
    "two" : 2,
}`;

validIpv4Test

Test if a value is a valid IPV4 CIDR block or IP address. Throw an error if it is not.

const { validIpv4Test } = require("lazy-z");

validIpv4Test("test", "honk");

// throws
("test expected valid ipv4 address or CIDR block, got honk");

Value Test Methods

The following methods evaluate values

arrTypeCheck

Check all items in an array for a specific type. Will throw an error if types do not match

const { arrTypeCheck } = require("lazy-z");

arrTypeCheck("array expected all elements to be", "string", ["one", 2])

// throws
`array expected all elements to be type string got ["string", "number"]

containsAny

Checks to see if any instances of string from one array are found in another array of string

const { containsAny } = require("lazy-z");

containsAny(["a"], ["b"]);
// returns
false;

containsAny(["b", "c", "d", "e"], ["b"]);
// returns
true;

containsCheck

Test to see if an array contains a value. Throw an error if not in the array

const { containsCheck } = require("lazy-z");

containsCheck(
  "should contain the number 4",
  ["frog", "string", "egg"],
  "4"
) // throws
`should contain the number 4 got ["frog", "string", "egg"]`;

emptyCheck

Test to see if an array is empty. Throw an error if it is.

const { emptyCheck } = require("lazy-z");

emptyCheck(
  "array should not be empty",
  []
) // throws
`array should not be empty`;

getType

Get the type of a value, evaluates to string, number, object, boolean, Array, or Function

const { getType } = require("lazy-z");

getType(getType);
// returns
("Function");

getType([]);
// returns
("Array");

getType({});
// returns
("object");

keyCheck

Throw an error when an object does not have needed keys

/**
 * Check an object for correct keys
 * @param {string} message Display message
 * @param {Object} value Value to check
 * @param {Array<string>} keys Keys to check for
 * @param {boolean?} strict Check to ensure only keys are present, otherwise non-present keys are ok
 * @throws if keys do not match
 */
function keyCheck(message, value, checkKeys, strict)


const { keyCheck } = require("lazy-z");

keyCheck("test expects to have the correct params", { foo: "baz" }, ["frog"]);
// throws
'test expects to have the correct params ["frog"] got ["foo"]'

keyTest

Test to see if an object has needed keys

/**
 * Test to see if an object has needed keys
 * @param {Object} value Value to check
 * @param {Array<string>} keys Keys to check for
 * @param {boolean?} strict Check to ensure only keys are present, otherwise non-present keys are ok
 * @returns {boolean} True if all params match
 */
function keyTest(value, checkKeys, strict)

const { keyTest } = require("lazy-z");

keyTest({foo: "baz"}, ["foo"]); // returns true
keyTest({foo: "baz", bar: "bar"}, ["foo"], true); // returns false
keyTest({foo: "baz", bar: "bar"}, ["foo", bar], true); // returns true

typeCheck

Checks a value type and throws an error if the type does not match. Acceptect types are string, number, object, boolean, Array, and Function.

const { typeCheck } = require("lazy-z");

typeCheck(
  "expects value to be type",
  "string",
  1
) // throws an error
`expects value to be type string got number`;

zoneTest

Checks to see if a zone number is 1, 2, or 3. Throws an error if it is not.

const { zoneTest } = require("lazy-z");

zoneTest(4)
// throws an error
"Zone must be 1, 2, or 3."

String Methods

Methods for dealing with strings

camelCase

Format a string from from All Caps With Spaces to allCapsWithSpaces

const { camelCase } = require("lazy-z");

camelCase(`All Caps With Spaces`);
camelCase(`All_Caps with-Spaces`);
camelCase(`all_caps_with_spaces`);
// all return
`allCapsWithSpaces`;

capitalize

Capitalize the first character of a string

const { capitalize } = require("lazy-z");

capitalize("help");
// returns
("Help");

getLongestKey

Get the length of the longest key from an object

const { getLongestKey } = require("lazy-z");

getLongestKey({ a: true, bb: false, ccc: true });
// returns
3;

kebabCase

Format a string from from All Caps With Spaces to all-caps-with-spaces

const { kebabCase } = require("lazy-z");

kebabCase(`All Caps With Spaces`);
kebabCase(`All_Caps with-Spaces`);
kebabCase(`all_caps_with_spaces`);
// all return
`all-caps-with-spaces`;

matchLength

Match the length of a string to a number by appending spaces

const { matchLength } = require("lazy-z");

matchLength("help", 12);
// returns
("help        ");

removeTrailingSpaces

const { removeTrailingSpaces } = require("lazy-z");

removeTrailingSpaces("help        ");
// returns
("help");

stringify

Create a string from any data type

const { stringify } = require("lazy-z");

stringify(
  stringify
) // returns
`function stringify(data) {
  let dataType = getType(data);
  if (dataType === "Function") return data.toString();
  if (dataType === "Array" || dataType === "object") return prettyJSON(data);
  else return \`\${data}\`;
}`;

titleCase

Format a string from from all-caps-with-spaces to All Caps With Spaces

const { titleCase } = require("lazy-z");

titleCase(`allCapsWithSpaces`);
titleCase(`All_Caps with-Spaces`);
titleCase(`all_caps_with_spaces`);
// all return
`All Caps With Spaces`;

Number Methods

Methods for numbers

isInRange

Return true if a number is contained in a range

const { isInRange } = require("lazy-z");

isInRange(1.5, 1, 2); // value, min, max
// returns
true;

haveValidRanges

Returns false if any number of ranges are not valid

const { haveValidRanges } = require("lazy-z");

haveValidRanges(
  [1, 0, 10],
  [2, 0, 10],
  [11, 0, 10]
)
// returns
false

validPortRange

Check if a port range is valid.

const { validPortRange } = require("lazy-z");

validPortRange(
  // can be one of ["type","code","port_min","port_max","source_port_min","source_port_max"]
  "port_min",
  8080
);
// returns
true;

validPortRange(
  // can be one of ["type","code","port_min","port_max","source_port_min","source_port_max"]
  "type",
  257
);
// returns
false;

portRangeInvalid

Return true if a port value is invalid

const { portRangeInvalid } = require("lazy-z");

portRangeInvalid("port_max", 8080.1); // name, value
// returns
true;

rangeInvalid

Return true if a range value is invalid

const { portRangeInvalid } = require("lazy-z");

portRangeInvalid("", 1, 65535); // value, min, max
// returns
true;

Object Methods

Methods for manipulating objects and arrays of objects

allFieldsNull

Check an object to see if all fields returned are null.

const { allFieldsNull } = require("./lazy-z");

// returns true
allFieldsNull({ test: null });
// returns false
allFieldsNull({ test: null, foo: "bar" });

arraySplatIndex

Get the index of an object from an array of objects with a specified key value.

const { arraySplatIndex } = require("lazy-z");

let arr = [
  {
    name: "todd",
  },
  {
    name: "egg",
  },
  {
    name: "frog",
  },
];

arraySplatIndex(arr, "name", "todd");
// returns
0;

carve

Remove an object from an array of objects with a specific key value.

const { carve } = require("lazy-z");

let arr = [
  {
    name: "todd",
  },
  {
    name: "egg",
  },
  {
    name: "frog",
  },
];

carve(arr, "name", "todd")[
  // returns
  {
    name: "todd",
  }
][
  // array value is now
  ({
    name: "egg",
  },
  {
    name: "frog",
  })
];

duplicateKeyTest

Test to see if an array of objects has any values with a duplicate key.

const { duplicateKeyTest } = require("lazy-z");

let arr = [
  {
    name: "todd",
  },
  {
    name: "egg",
  },
  {
    name: "frog",
  },
];

duplicateKeyTest("test", arr, "name", "todd");
// throws
("test expected no duplicate keys for name. Duplicate value: todd");

getObjectFromArray

Get an object from an array of objects with a specific key value

const { getObjectFromArray } = require("lazy-z");

let arr = [
  {
    name: "todd",
  },
  {
    name: "egg",
  },
  {
    name: "frog",
  },
];

getObjectFromArray(arr, "name", "todd");
// returns
{
  name: "todd";
}

hasDuplicateKeys

Check to see if an object with a key value exists in an array of objects

const { hasDuplicateKeys } = require("lazy-z");

let arr = [
  {
    name: "todd",
  },
  {
    name: "egg",
  },
  {
    name: "frog",
  },
];

hasDuplicateKeys(arr, "name", "todd"); // returns true
hasDuplicateKeys(arr, "name", "ham"); // returns false

splat

Get all values from a specified object key in an array of objects.

const { splat } = require("lazy-z");

let arr = [
  {
    name: "todd",
  },
  {
    name: "egg",
  },
  {
    name: "frog",
  },
];

splat(arr, "name")[
  // returns
  ("todd", "egg", "frog")
];

splatContains

Get all values for a field in an array of objects and return true if a specified value is found.

const { splatContains } = require("lazy-z");

// returns true
splatContains(
  [
    {
      name: "todd",
    },
    {
      name: "egg",
    },
    {
      name: "frog",
    },
  ],
  "name",
  "egg"
);

spreadKeyValues

Transform all key values from an object into an array.

const { spreadKeyValues } = require("lazy-z");

spreadKeyValues({
  one: 1,
  two: 2,
  three: 3,
})[
  // returns
  (1, 2, 3)
];

transpose

Set keys from one object to another in place

const { transpose } = require("lazy-z")

let destination = { one: 1 };
let source = { two: 2 };
transpose(source, destination);

// all keys from the source object are added to the destination
// new value for destination object
{
  one: 1,
  two: 2
}

nullOrEmptyStringFields

Check to see if any key values of an object are null or empty

const { nullOrEmptyStringFields } = require("lazy-z");

let obj1 = {"key1": "one", "key2": null};
let obj2 = {"key1": "one", "key2": "two"}
let keyArray = ["key1", "key2"];

nullOrEmptyStringFields(obj1, keyArray); // returns true
nullOrEmptyStringFields(obj2, keyArray); // returns false

Encoding Methods

Methods that transform data

hclEncode

Create HCL from JSON data

/**
 * Create HCL from JSON data as a .tfvars file
 * @param {Object} jsonObject object data to transpose
 * @param {boolean} objectMode Return formatted as a single hcl object instead of as tfvars
 * @returns {string} HCL encoded data
 */
function hclEncode(jsonObject, objectMode)

Example:

const { hclEncode } = require("lazy-z");

hclEncode(
  {
    virtual_private_endpoints: [
      {
        service_name: "cos",
        service_type: "cloud-object-storage",
        resource_group: "slz-service-rg",
        vpcs: [
          {
            name: "management",
            subnets: ["vpe-zone-1", "vpe-zone-2", "vpe-zone-3"],
          },
          {
            name: "workload",
            subnets: ["vpe-zone-1", "vpe-zone-2", "vpe-zone-3"],
          },
        ],
      },
    ],
  },
  true
);

// returns
`{
  virtual_private_endpoints = [
    {
      service_name   = "cos"
      service_type   = "cloud-object-storage"
      resource_group = "slz-service-rg"
      vpcs           = [
        {
          name    = "management"
          subnets = ["vpe-zone-1","vpe-zone-2","vpe-zone-3"]
        }
        {
          name    = "workload"
          subnets = ["vpe-zone-1","vpe-zone-2","vpe-zone-3"]
        }
      ]
    }
  ]
}`;

CLI Utility Methods

Utilities for CLI tools. flagValues is the main method, each other CLI Utility Method is used by flagValues.

flagValues

Create key value pairs from list of command arguments

/**
 * Create key value pairs from list of command arguments
 * @param {string} command name of command
 * @param {Object} action action
 * @param {Array} action.requiredFlags Flags required by the action
 * @param {?Array} action.optionalFlags Optional flags
 * @param {Object} tags key value pair of tags
 * @param  {...any} commandArgs command line arguments
 * @returns {Object} object containing key value pairs of params from tags
 */
function flagValues(command, action, tags, ...commandArgs)

Example use:

// command name
let command = "plan";

// parameters needed for plan
let planParameters = {
  requiredFlags: ["in", "out", "type"],
  optionalFlags: [
    {
      name: "tfvars",
      allowMultiple: true,
    },
  ],
};

// map of valid tags with aliases
let tags = {
  help: ["-h", "--help"],
  in: ["-i", "--in"],
  out: ["-o", "--out"],
  type: ["-t", "--type"],
  tfvars: ["-v", "--tf-var"],
}

flagValues(
  command,
  planParameters,
  tags,
  "--in",
  "./in-file-path/",
  "--out",
  "./out-file.test.js",
  "--tf-var",
  "tfx",
  "--tf-var",
  "testVar1=true",
  "--tf-var",
  'testVar2="true"'
)

// returns
 {
  in: "./in-file-path/",
  out: "./out-file.test.js",
  type: "tfx",
  tfvars: ["testVar1=true", 'testVar2="true"']
}

flagTest

Test for invalid or duplicate required flags

/**
 * Test for invalid or duplicate required flags
 * @param {string} command name of the command
 * @param {Object} aliases key map of key with allowed synonyms
 * @param  {...any} commandArgs List of arguments
 * @throws if any values are duplicates. strings are thrown to allow custom user error handling
 */
function flagTest(command, aliases, ...commandArgs)

Example use:

const { flagTest } = require("lazy-z");

flagTest(
  "help"
  {
    "-h": "--help",
    "--help": "-h",
  },
  "-h",
  "-h"
)

// throws
"Invalid duplicate flag -h"

getVerbActions

Create a list of all available flags and aliases for a command

/**
 * Get actions from a verb object
 * @param {Object} action action
 * @param {Array} action.requiredFlags Flags required by the action
 * @param {Array} action.optionalFlags Optional flags
 * @param {Object} tags tags object
 * @returns {Object} Aliases for the verb
 */
function getVerbActions(action, tags)

Example use:

let plan = {
  requiredFlags: ["in", "out", "type"],
  optionalFlags: [
    {
      name: "tfvar",
      allowMultiple: true,
    },
    {
      name: "shallow"
    }
  ],
};
let tags = {
  help: ["-h", "--help"],
  in: ["-i", "--in"],
  out: ["-o", "--out"],
  type: ["-t", "--type"],
  tfvar: ["-v", "--tf-var"],
  shallow: ["-s", "--shallow"]
};

getVerbActions(plan, tags)

// returns
{
  "-i": "--in",
  "--in": "-i",
  "-o": "--out",
  "--out": "-o",
  "-t": "--type",
  "--type": "-t",
  "?*-v": "?*--tf-var",
  "?*--tf-var": "?*-v",
  "?-s" | "?--shallow",
  "?--shallow" | "?-s"
};

replaceOptionalFlags

Replace literal optional arguments by prepending ?* for multiple optional arguments and ? for optional arguments.

/**
 * Replace optional flags from command args to denote multiple and optional flags
 * @param {Object} action action
 * @param {Array} action.requiredFlags Flags required by the action
 * @param {?Array} action.optionalFlags Optional flags
 * @param {Object} tags tags object
 * @param  {...any} commandArgs List of arguments
 * @returns {Array<string} Modified list of commang args
 */
function replaceOptionalFlags(action, tags, ...commandArgs)

Example use:

let commandFlags = {
  requiredFlags: ["in", "out", "type"],
  optionalFlags: [
    {
      name: "tfvar",
      allowMultiple: true,
    },
    {
      name: "shallow",
    },
  ],
};

let tags = {
  help: ["-h", "--help"],
  in: ["-i", "--in"],
  out: ["-o", "--out"],
  type: ["-t", "--type"],
  tfvar: ["-v", "--tf-var"],
  shallow: ["-s", "--shallow"],
};

replaceOptionalFlags(commandFlags, tags, "--in", "file_path", "--shallow")[
  // returns
  ("--in", "file_path", "?--shallow")
];

Array Methods

numberStringList

Create a list of stringified numbers within a range

const { numberStringList } = require("lazy-z");

numberStringList(5);
// returns
["0", "1", "2", "3", "4"];

numberStringList(5, 1);
// returns
["1", "2", "3", "4", "5"];

flatten

Create a single tiered array from a multi-tiered array.

const { flatten } = require("lazy-z");

let testData = [
  "one",
  ["two"],
  [["three", "four"]],
  [[["five", "six", [["seven"]]]]],
];

flatten(testData)[
  // returns
  ("one", "two", "three", "four", "five", "six", "seven")
];

nestedSplat

Get a list of values from an array of objects insive an array of objects.

const { nestedSplat } = require("lazy-z");

nestedSplat(
  [
    {
      name: "foo",
      items: [
        {
          name: "item-1",
        },
        {
          name: "item-2",
        },
      ],
    },
    {
      name: "bar",
      items: [
        {
          name: "item-3",
        },
        {
          name: "item-4",
        },
      ],
    },
  ],
  "items",
  "name"
);

// returns
["item-1", "item-2", "item-3", "item-4"]

deleteUnfoundArrayItems

delete unfound items from an array of strings

const { deleteUnfoundArrayItems } = require("lazy-z");

deleteUnfoundArrayItems(
  ["foo", "bar", "baz"], // all items
  ["baz", "bork"] // items to return if found
)

// returns
["baz"]

anyAreEmpty

Check any number of arrays and returns true if any are empty

const { anyAreEmpty } = require("lazy-z");

anyAreEmpty(
  ["foo", "bar", "baz"], 
  ["baz", "bork"],
  [],
  [false],
  // any number of arrays can be passed as additional arguments
)

// returns
true

deepCopyArrayOfObjects

Create a deep copy of an array of objects

const { deepCopyArrayOfObjecs } = require("lazy-z");

deepCopyArrayOfObjects(
  [
    { name: "foo" },
    { name: "bar" }
  ]
)

// returns
[ { name: "foo" }, { name: "bar" }] // deep copy of array

lazyZstate

Lazy Z state is a state store constructor used for maniuplating complex objects.

lazyZstate initialization

/**
 * state constructor object
 * @param {object=} defaults defaults for store data
 * @param {object=} defaults._defaults key value pairs of default values for store
 * @param {Array<string>=} defaults._no_default list of values in store to set to `null`
 * @param {object=} store arbitrary key value pairs to add to store object. values are added after defaults
 */

let state = new lazyZstate(defaults, store);

Example Usage

const = { lazyZstate } = require("lazy-z");


// with no store
let state = new lazyZstate({
  _defaults: {
    frog: true,
    numbers: [1, 2, 3, 4],
    data: {
      foo: "baz",
    },
  },
  _no_default: ["todd"],
})

// state.store value
{
  frog: true,
  numbers: [1, 2, 3, 4],
  data: {
    foo: "baz",
  },
  todd: null,
}

// with store

let stateWithStore = new lazyZstate(
  {
    _defaults: {
      frog: true,
      numbers: [1, 2, 3, 4],
      data: {
        foo: "baz",
      },
    },
    _no_default: ["todd"],
  },
  {
    frog: "yes",
    hi: "mom",
  }
)

// stateWithStore.store value
{
  frog: "yes",
  numbers: [1, 2, 3, 4],
  data: {
    foo: "baz",
  },
  todd: null,
  hi: "mom",
}

lazyZstate Store Template

lazyZstate uses a template to create functions to initialize and update store fields and state methods. To create a field, use the lazyZstate.newField constructor function.

lazyZstate.setUpdateCallback

Set an update callback function to run when state data is changed

/**
 * Set update callback. This function will be run when components update
 * @param {Function} callback callback function
 */
lazyZstate.setUpdateCallback = function (callback) {
  paramTest(`state.setUpdateCallback`, "callback", "Function", callback);
  this.updateCallback = callback;
};

Example Usage

const = { lazyZstate } = require("lazy-z");

let state = new lazyZstate();
let callback = () => {
  console.log("hi");
};
state.setUpdateCallback(callback);
state.update();

// on update logs
`hi`

lazyZstate.sendError

Logs errors to the console, if an error callback is set, runs it, otherwise throws the error as well

/**
 * send an error
 * @param {Error} err error
 * @throws when message provided
 */
this.sendError = function (err) {
  console.error(err);
  if (this.sendErrorCallback) this.sendErrorCallback(err);
  else throw new Error(err);
};

Example Usage

const = { lazyZstate } = require("lazy-z");

let state = new lazyZstate();
state.sendError("error");

// errors
`error`
// throws
`Error: error`

lazyZstate.setErrorCallback

Set an error callback function to run when an error is sent

/**
 * set callback for error handling
 * @param {setErrorCallback} callback callback function
 */
this.setErrorCallback = function (callback) {
  paramTest(`lazyZstate.setErrorCallback`, "callback", "Function", callback);
  this.sendErrorCallback = callback;
};

Example Usage

const = { lazyZstate } = require("lazy-z");

let state = new lazyZstate();
let callback = () => {
  console.log("hi from callback");
};
state.setErrorCallback(callback);
state.sendError();

// errors
`hi`
// logs
`hi from callback`

Axios Mocks

lazy-z provides a test framework for creating mock axios calls.

Initializing the Constructor

The mock axios constructor can be initialized with two parameters:

  • data - an arbitrary object of data to be returned when the promise resolves
  • err - an optional boolean. By setting this value to true, the data passed in as data will be sent on rejection instead of resolve.

Example Usage

const { initMockAxios } = require("lazy-z");

describe("axios", () => {
  it("should return a promise when called with params on resolve", () => {
    let { axios } = initMockAxios({ data: true }); // successful promise
    // axios method
    return axios({ params: "yes" }).then((data) => {
      assert.isTrue(data.data.data, "it should be true");
    });
    // axios.get method
    return axios.get({ params: "yes" }).then((data) => {
      assert.isTrue(data.data.data, "it should be true");
    });
    // axios.post method
    return axios.post({ params: "yes" }).then((data) => {
      assert.isTrue(data.data.data, "it should be true");
    });
    // axios.put method
    return axios.put({ params: "yes" }).then((data) => {
      assert.isTrue(data.data.data, "it should be true");
    });
    // axios.patch method
    return axios.patch({ params: "yes" }).then((data) => {
      assert.isTrue(data.data.data, "it should be true");
    });
    // axios.delete method
    return axios.delete({ params: "yes" }).then((data) => {
      assert.isTrue(data.data.data, "it should be true");
    });
  });
  it("should reject when error is true", () => {
    let { axios } = initMockAxios({ data: true }, true); // unsuccessful promise
    return axios({ params: "yes" }).catch((data) => {
      assert.isTrue(data.data, "it should be true");
    });
  });
});

Networking Utilities

Network utilities are designed to make the automated creation of virtual networks easier.

buildNetworkingRule

Create a networking rule. These networking rules are configured for use on IBM Cloud but could easily be adapted for other providers. buildNetworkingRule will also check to ensure that rules have valid type, code, or port ranges.

/**
 * Build a networking rule
 * @param {Object} params networking rule params
 * @param {string} params.name name of acl rule
 * @param {boolean} params.allow true to allow, false to deny
 * @param {boolean} params.inbound true for inbound, false for outbound
 * @param {string} params.source cidr block or ip
 * @param {string} params.destination cidr block or ip. if creating a security group rule, use `null`
 * @param {string=} params.ruleProtocol optional. can be one of `icmp`, `tcp`, or `udp`
 * @param {Object=} params.rule object describing traffic rule if using rule type
 * @param {number} params.rule.code code for icmp rules
 * @param {number} params.rule.type code for icmp rules
 * @param {number} params.rule.port_min port_min for tcp and udp rules
 * @param {number} params.rule.port_max port_max for tcp and udp rules
 * @param {number} params.rule.source_port_min source_port_min for tcp and udp rules
 * @param {number} params.rule.source_port_max source_port_max for tcp and udp rules
 * @param {boolean=} isAcl is acl rule, false if is security group
 * @returns {Object} network acl object
 */
function buildNetworkingRule(params, isAcl)

Example Usage

// security group rule
buildNetworkingRule({
  name: "allow-ibm-inbound",
  allow: true,
  inbound: true,
  source: "161.26.0.0/16",
  destination: "10.0.0.0/8",
  ruleProtocol: "tcp",
  rule: {
    port_max: 443,
    port_min: 443,
  }
});

// returns
{
  direction: "inbound",
  name: "allow-ibm-inbound",
  source: "161.26.0.0/16",
  icmp: {
    type: null,
    code: null,
  },
  tcp: {
    port_min: 443,
    port_max: 443,
  },
  udp: {
    port_min: null,
    port_max: null,
  },
}

// acl rule
buildNetworkingRule({
  name: "allow-ibm-inbound",
  allow: true,
  inbound: true,
  source: "161.26.0.0/16",
  destination: "10.0.0.0/8",
},true);

// returns
{
  action: "allow",
  destination: "10.0.0.0/8",
  direction: "inbound",
  name: "allow-ibm-inbound",
  source: "161.26.0.0/16",
  icmp: {
    type: null,
    code: null,
  },
  tcp: {
    port_min: null,
    port_max: null,
    source_port_min: null,
    source_port_max: null,
  },
  udp: {
    port_min: null,
    port_max: null,
    source_port_min: null,
    source_port_max: null,
  }
}

formatCidrBlock

Create a dynamic CIDR block

/**
 * format a cidr block with 256 ips to be calculated programatticaly
 * @param {number} vpc index of vpc within architecture
 * @param {number} zone zone, can be 1, 2, or 3
 * @param {number} tier index of subnet tier
 * @param {boolean=} isEdge is edge network
 * @returns {string} network cidr
 */
function formatCidrBlock(vpc, zone, tier, isEdge)

Example Usage

formatCidrBlock(0, 1, 0)
// returns
"10.10.10.0/24"

formatCidrBlock(0, 1, 0, true)
// returns
"10.5.10.0/24"

Contributing

If you have any questions or issues you can create a new [issue here][issues]. See the full contribution guidelines here.

This repo uses Prettier JS for formatting. We recommend using the VS Code extension.

Pull requests are very welcome! Make sure your patches are well tested. Ideally create a topic branch for every separate change you make. For example:

  1. Fork the repo
  2. Create your feature branch (git checkout -b my-new-feature)
  3. Commit your changes (git commit -am 'Added some feature')
  4. Push to the branch (git push origin my-new-feature)
  5. Create new Pull Request

Code Test Coverage

File % Stmts % Branch % Funcs % Lines Uncovered Line #s
All files 100 100 100 100 🏆
arrays.js 100 100 100 100 🏆
axios-mocks.js 100 100 100 100 🏆
cli-utils.js 100 100 100 100 🏆
encode.js 100 100 100 100 🏆
networking.js.js 100 100 100 100 🏆
numbers.js 100 100 100 100 🏆
objects.js 100 100 100 100 🏆
revision.js 100 100 100 100 🏆
shortcuts.js 100 100 100 100 🏆
strings.js 100 100 100 100 🏆
values.js 100 100 100 100 🏆

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lazy-z is a light-weight NodeJS library for assorted shortcuts and utilities

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